STIEBEL ELTRON WWK 222 - OPERATION 14.4 Motor Overload Relay; 15 Maintenance; Removing the Appliance Cover; Resetting the Safety Pressure Limiter

iNSTallaTiON
Maintenance
30 | WWK222-302 H www.stiebel-eltron.com
Fault description Remedy
E 32 Con-
tinu-
ously
on
An electrical fault has oc-
curred.
A1/X2 : Check whether the power
supply has been interrupted. Then
reset the fault with the corre-
sponding menu option.
E 64 Flash-
ing
Evaporator temperature <
Minimum evaporator tem-
perature
Check whether the evaporator is
clogged with deposits. If required,
clean the evaporator with clear
water without cleaning agents or
other additives.
Check whether air can flow freely
through the appliance.
Check whether the fan is blocked
or faulty. Replace the fan if nec-
essary.
Check the function and setting of
the expansion valve.
Check whether the appliance has
defrosted.
E
128
Flash-
ing
A permanent pressure switch
fault has occurred. A pressure
fault occurred multiple times
within a defined pressure
fault evaluation time.
Check the relevant fault counter
and look up the corresponding
fault code remedy: E16 (high pres-
sure), E32 (electrical wiring fault).
Once the cause of the fault has
been eliminated, clear the fault
code in menu item "Hd 1" by press-
ing the "Rapid heat-up" button.
14.2 Resetting the safety pressure limiter
The safety pressure limiter responds in the event of unacceptably
high pressure in the refrigerant circuit. If the safety pressure lim-
iter responds 5 times in 5 hours, compressor operation is blocked.
 Eliminate the cause of the increased pressure in the refriger-
ant circuit.
 Wait approx.5-15minutes for the appliance to equalise the
pressure.
The appliance lockout can only be cleared using a service pro-
gramming unit.
14.3 WWK222H/ WWK 302H : Resetting the high
limit safety cut-out
If the DHW cylinder is overheated, the high limit safety cut-out
switches off the electric emergency/booster heater to protect the
appliance.
D0000039352
1
1 Reset button for high limit safety cut-out
 Once the cause of the fault has been removed, press the reset
button of the high limit safety cut-out on the rod thermostat.
To do so, remove the appliance cover.
14.4 Motor overload relay
The motor overload relay will shut down the compressor if it is
overloaded because of excessive thermal load.
 Remove the cause.
After a short cooling period, the motor overload relay will restart
the compressor automatically.
15. Maintenance
WARNING Electrocution
Prior to all work on the appliance, isolate it from the
power supply.
15.1 Removing the appliance cover
D0000040621
 Undo the screw (Torx) that secures the programming/control
cover to the appliance.
 Push the programming/control cover upwards.